added queue.js to simplify jarvis

2 files changed, 27 insertions, 13 deletions

diff --git a/examples/jarvis.js b/examples/jarvis.js
index d60bc44..00b4610 100644
--- a/examples/jarvis.js
+++ b/examples/jarvis.js
@@ -5,6 +5,7 @@ const Socket = require('../socket');
 const getdims = require('../utils/getdims');
 const tilekeys = require('../utils/tilekeys');
 const Search = require('../tools/search');
+const Queue = require('../tools/queue');
 
 var main = new Socket();
 
@@ -57,21 +58,10 @@ function identity(sender){
 let response = new Space();
 response.adhoc('yes, my liege');
 
-let queue = []; // Must be expanded to handle actual use cases
-let open = true;
-function dequeue(){
-  if (queue.length == 0)
-    open = true;
-  else{
-    open = false;
-    main.write(queue.shift()) // Make more general (possibly a function pointer or a conf variable)
-    setTimeout(dequeue, 1000);
-  }
-}
+let writes = new Queue(1000, 200, (elems) => main.write(elems));
 
 function respond(coord){
   console.log('called at', coord);
   response.loc = coord;
-  queue.push(response.towrite());
-  if (open) dequeue();
+  writes.enqueue(...response.towrite());
 }
diff --git a/tools/queue.js b/tools/queue.js
new file mode 100644
index 0000000..ebe17cd
--- /dev/null
+++ b/tools/queue.js
@@ -0,0 +1,24 @@
+// A generalized queue object for rapid responses (doesn't do prioritization or algorithmic timesharing)
+
+module.exports = function(delayms, maxExport, call){
+  let queue = [];
+  let open = true;
+  let getObjs = (maxExport == 1) ?
+    () => queue.shift() :
+    () => queue.splice(0, maxExport) ;
+  this.enqueue = function(){
+    for (let i = 0; i < arguments.length; i++)
+      queue.push(arguments[i]);
+    if (open) dequeue();
+  }
+
+  function dequeue(){
+    if (queue.length == 0)
+      open = true;
+    else {
+      open = false;
+      call(getObjs());
+      setTimeout(dequeue, delayms);
+    }
+  }
+}